Permalink
142 lines (129 sloc) 5.42 KB
<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
use Yii;
use yii\base\InvalidConfigException;
use yii\web\JsExpression;
use yii\helpers\Json;
/**
* EmailValidator validates that the attribute value is a valid email address.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class EmailValidator extends Validator
{
/**
* @var string the regular expression used to validate the attribute value.
* @see http://www.regular-expressions.info/email.html
*/
public $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/';
/**
* @var string the regular expression used to validate email addresses with the name part.
* This property is used only when [[allowName]] is true.
* @see allowName
*/
public $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/';
/**
* @var bool whether to allow name in the email address (e.g. "John Smith <john.smith@example.com>"). Defaults to false.
* @see fullPattern
*/
public $allowName = false;
/**
* @var bool whether to check whether the email's domain exists and has either an A or MX record.
* Be aware that this check can fail due to temporary DNS problems even if the email address is
* valid and an email would be deliverable. Defaults to false.
*/
public $checkDNS = false;
/**
* @var bool whether validation process should take into account IDN (internationalized domain
* names). Defaults to false meaning that validation of emails containing IDN will always fail.
* Note that in order to use IDN validation you have to install and enable `intl` PHP extension,
* otherwise an exception would be thrown.
*/
public $enableIDN = false;
/**
* @inheritdoc
*/
public function init()
{
parent::init();
if ($this->enableIDN && !function_exists('idn_to_ascii')) {
throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.');
}
if ($this->message === null) {
$this->message = Yii::t('yii', '{attribute} is not a valid email address.');
}
}
/**
* @inheritdoc
*/
protected function validateValue($value)
{
if (!is_string($value)) {
$valid = false;
} elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) {
$valid = false;
} else {
if ($this->enableIDN) {
$matches['local'] = idn_to_ascii($matches['local']);
$matches['domain'] = idn_to_ascii($matches['domain']);
$value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close'];
}
if (strlen($matches['local']) > 64) {
// The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1
// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1
$valid = false;
} elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) {
// There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands
// of 254 characters. Since addresses that do not fit in those fields are not normally useful, the
// upper limit on address lengths should normally be considered to be 254.
//
// Dominic Sayers, RFC 3696 erratum 1690
// http://www.rfc-editor.org/errata_search.php?eid=1690
$valid = false;
} else {
$valid = preg_match($this->pattern, $value) || $this->allowName && preg_match($this->fullPattern, $value);
if ($valid && $this->checkDNS) {
$valid = checkdnsrr($matches['domain'] . '.', 'MX') || checkdnsrr($matches['domain'] . '.', 'A');
}
}
}
return $valid ? null : [$this->message, []];
}
/**
* @inheritdoc
*/
public function clientValidateAttribute($model, $attribute, $view)
{
ValidationAsset::register($view);
if ($this->enableIDN) {
PunycodeAsset::register($view);
}
$options = $this->getClientOptions($model, $attribute);
return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');';
}
/**
* @inheritdoc
*/
public function getClientOptions($model, $attribute)
{
$options = [
'pattern' => new JsExpression($this->pattern),
'fullPattern' => new JsExpression($this->fullPattern),
'allowName' => $this->allowName,
'message' => Yii::$app->getI18n()->format($this->message, [
'attribute' => $model->getAttributeLabel($attribute),
], Yii::$app->language),
'enableIDN' => (bool)$this->enableIDN,
];
if ($this->skipOnEmpty) {
$options['skipOnEmpty'] = 1;
}
return $options;
}
}